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  • 11
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 6 (1979), S. 109-112 
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract By means of the muon spin rotation technique (μ+SR), the temperature dependence of the magnetic field inside the normal-conducting domains of high-purity tantalum crystals in the intermediate state has been measured in the temperature range 2.36K〈T〈3.5K. The results agree well with macroscopic measurements of the thermodynamical critical field. It is also shown that the distribution of magnetic fields in the mixed state of niobium single crystals may be determined by μ+SR. Possible applications of these findings to the study of long-range diffusion of positive muons at low temperatures are indicated.
    Type of Medium: Electronic Resource
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  • 13
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 14
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 146 (1925), S. 230-238 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 146 (1925), S. 201-224 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In der vorhergehenden Diskussion der Valenzverhältnisse der Elemente Bor, Kohlenstoff und Stickstoff ist gezeigt worden, daß man die verschiedenen Valenzstufen durch Atommodelle darstellen kann, die sich voneinander durch eine verschiedene Besetzung mit Elektronen der außerhalb der äußersten geschlossenen Edelgasschale gelegenen Quantenbahnen unterscheiden. Zwischen diesen verschiedenen Elektronenanordnungen finden Übergänge statt, und manche derselben befinden sich in einem dynamischen Gleichgewichte miteinander, wodurch der Übergang von einer Valenzstufe zur anderen und die beobachteten Gleichgewichte zwischen Verbindungen verschiedener Valenzstufen ihre Erklärung finden.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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  • 16
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 66 (1910), S. 60-72 
    ISSN: 0863-1778
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 17
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 69 (1910), S. 52-96 
    ISSN: 0863-1778
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 18
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 215 (1997), S. 169-178 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A new Compton suppression system was established. A low energy HPGe detector (LO-AX) is used as the analyzing detector. It is completely shielded by a 50%n-type HPGe and two NaI(TI) detectors. Experiments show that a substantial Compton suppression effect is also achieved in the low energy region down to 15 keV. The capability of applying this system in INAA was evaluated for 13 elements (As, Cd, Co, Cr, Hg, Mo, Ni, Sb, Se, Sr, Th, U and Zn) in biological and environmental samples. The benefits and problems of using this Compton suppression spectrometer in INAA are examined for each element.
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  • 19
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 243 (2000), S. 447-450 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract An individual in vivo monitor using seven Germanium detectors with a total area of 24,000 mm2 was prepared for 210Pb skull measurements. System calibration with anthropomorphic head phantoms and a straightforward efficiency estimation yielded a minimum detectable activity (MDA) of 6.7 Bq and a lower limit of detection (LLD) of 14 Bq (CL: 95%). Two selected persons were measured for 1 h each to reconstruct their cumulative radon exposure. From the added pulse height spectrum a 210Pb activity in the skull of 3.1±7.2 Bq (result with 95%-CL) was estimated, but clear conclusions on their radon exposure using a new metabolism model of lead in man could not be drawn. Further improvements in the selection of highly exposed persons as well as head calibration and Lackground reduction are necessary using this attempt for retrospective exposure reconstruction.
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 9 (1978), S. 225-237 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Active Protection against Wear saves MaterialIn almost all industrial branches, wear processes cause considerable loss of material mainly in the field of metal:metal and metal:mineral contact.The so accrueing significant loss of material grows owing to an increase of specific throughput in machinery, processing in combined systems, more efficient utilization of raw material and introduction of modern technology for the extraction of raw material and the recycling processes. Finally the progressing desires exists to reduce the consequential expenses arising from such losses.In the future, however, the decisive factor will not be the actual shortage of raw material but moreover the politically caused shortage and the ratio of increasing expenditure between raw material and wages. Material savings are possible by making use of the presently known fundamentals of wear. In details the following precautions are available:- Saving of material in new parts- Utilization of higher class materials- Application of parts produced out of different materials- Reclamation of worn-out partsThe problems of metal:mineral wear are illustrated by numerous examples.The here described precautions enable the engineer to save raw materials.
    Notes: Durch Abnutzung entstehen in den verschiedensten Bereichen der Technik erhebliche Materialverluste hauptsächlich bei Metall:Metall- und Metall:Mineral-Berührung. Der dadurch entstehende beträchtliche Materialverlust nimmt zu durch die Erhöhung des spezifischen Durchsatzes eingesetzter Maschinen, des Arbeitens im Verbundsystem, höherer Rohstoffausbeutung, Einführung moderner Technologien bei Rohstoffgewinnung und Recycling und dem zunehmenden Wunsch, die durch solche Schäden entstehenden Folgekosten zu vermindern. Dabei ist nicht echte Rohstoffknappheit maßgebend sondern vielmehr die in Zukunft sich verändernde Relation der Steigerungsraten von Rohstoffkosten und Lohnkosten. Materialeinsparungen sind durch Anwendung der heute bekannten Grundlagen auf dem Verschleißgebiet möglich. Im einzelnen umfassen sie die Maßnahmen:- Einsparen von Material bei Neuteilen,- Einsetzen höherwertiger Werkstoffe,- Einsetzen von Verbundlösungen und- Regenerieren abgenutzter Teile.Zahlreiche praktische Beispiele aus dem Bereich des Metall:Mineral- Verschleißes werden erläutert.Durch diese Maßnahmen hat der Ingenieur die Möglichkeit, Rohstoffe einzusparen.
    Additional Material: 36 Ill.
    Type of Medium: Electronic Resource
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